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Merge pull request #1409 from Kurausukun/M4A_IS_DEAD

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FIX CGBMODVOL FAKEMATCHING (WE DID IT REDDIT)
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GriffinR 2021-04-20 00:14:02 -04:00 committed by GitHub
commit b65d4eb910
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1 changed files with 4 additions and 9 deletions
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13
src/m4a.c
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@ -887,18 +887,13 @@ void CgbModVol(struct CgbChannel *chan)
if ((soundInfo->mode & 1) || !CgbPan(chan))
{
chan->pan = 0xFF;
chan->envelopeGoal = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
chan->envelopeGoal = (u32)(chan->leftVolume + chan->rightVolume);
chan->envelopeGoal /= 16;
}
else
{
// Force chan->rightVolume and chan->leftVolume to be read from memory again,
// even though there is no reason to do so.
// The command line option "-fno-gcse" achieves the same result as this.
#ifndef NONMATCHING
asm("" : : : "memory");
#endif
chan->envelopeGoal = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
chan->envelopeGoal = (u32)(chan->leftVolume + chan->rightVolume);
chan->envelopeGoal /= 16;
if (chan->envelopeGoal > 15)
chan->envelopeGoal = 15;
}